Descriptions:
This mod contains the following Cummins ISX engines according to the following horsepower:
ISX12 370
ISX12 425
ISX15 450
ISX15 500
ISX15 550
ISX15 600

In addition, it contains two engines from Cummins ISX Signature line, dedicated especially for oversized and overweight loads:

ISX Signature 600
ISX Signature 720 Chipped

Contains the following variants:
-Stock Version
-Open Pipes
-Straight Pipes

One sound variant are based on Kapitan Kriechbaum’s audios and another two from Odd_Fellow, adapted according to use of mods prior to 1.36 ATS.

The sounds of the Cummins ISX Signature are based on the sounds of Kapitan Kriechbaum for the 2015 versions of Euro Truck Simulator 2, and they are present in all the trucks on the list.

Tested on American Truck Simulator versions 1.39 to 1.46 per FMOD guidelines, includes engine sounds in the game’s convoy mode (only available since version 1.42). .

Updates:
v 2.0
-Added support for Western Star 5700XE (SCS)
-Minor corrections in sounds.

Credits:
eelDavidGT (conversion of audios to FMOD system and mixing of various sounds)
Mocos Trucker, Juan_DF, Mapache Game (tests)
Kapitan Kriechbaum, Odd_Fellow (original sounds)
SCS (base sounds)

Authors:
eelDavidGT (conversion of audios to FMOD system and mixing of various sounds)
Mocos Trucker, Juan_DF, Mapache Game (tests)
Kapitan Kriechbaum, Odd_Fellow (original sounds)
SCS (base sounds)

Download Link 2: Download mod